Whats the usual increase in sales % during the holidays?

[Aj_habfan]

http://www.vgchartz.com/weekly.php?date=39439&console=&maker=&boxartz=1

Look at the peak of the holiday season last year, the top week:

DS: 2,019,006
Wii: 1,463,690
PSP: 754,117
PS2: 711,193
PS3: 621,503
360: 592,722
GBA: 110,395


It's a very exciting time.